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# Lossless JPEG
Huffman compression applied to the bits.
It is used by [[Canon_CR2|Canon_CR2]], [[Kodak_DCR|Kodak_DCR]] and [[Adobe DNG|Adobe DNG]]
* ljpeg seems to be the only C reference implementation, and according the le JPEG-FAQ has bugs with 16-bits.
* Adobe DNG SDK seems to use an adaptation of the former, in C++. To bad the license isn't GPL compatible.
* [[jrawio|https://jrawio.dev.java.net/]] in Java has an implementation that seems to work. Only RC5 is GPL compatible as past version are under the Apache 2.0 license.
* dcraw also implements it.
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